Comparison

Uair vs Lux Light Meter

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Uair

Features
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Uair sets a mechanical watch to the second, then keeps a record of every watch you own and how each one runs. SET IT Pick a minute and Uair counts you in. Pull the crown to stop the seconds hand at 12, set the hands to the time on screen, and wait. The last three seconds fill the screen. At zero the screen flips and the phone taps in your hand: push in the crown. That's it, to the second, against your iPhone's network time. FIVE FACES Day-Date, GMT, Moonphase, Dive and Chronograph, each drawn for its complication: the date window, a second timezone on the 24-hour hand, today's moon, the bezel, the subdials. Each one comes with a short guide to what the hands are for and how to set them. THE COLLECTION Keep every watch you own in one place: photos, reference, serial, movement, what you paid, and every service. Uair lifts each watch out of its photo and sets them all at the same size, so the collection looks like one. Then find out how it really keeps time: • Listen. Lay the watch on the phone and Uair times its tick through the microphone. A rate in seconds a day, with beat rate and beat error, in about twenty seconds. • Check the time. Tap as the seconds hand passes 12, again a day or two later. Over a few days of wear you get the rate on the wrist: every position, every temperature, the one that matters. Rates are kept run by run, so you can see a watch before and after a regulation, and which ones have started to drift. WIDGETS A watch face for the Home Screen, Lock Screen and StandBy, and a Watch rate widget that shows how one of your watches is running. PRIVATE No account, no analytics. Your watches stay on your device, photos are cut out on the device, and the microphone sound is analysed as it arrives and never saved or sent anywhere. PRICING Setting your watch, the faces and the face widgets are free, always. The Collection is a one-time unlock with a free 14-day trial. The trial ends on its own and never charges you. Unlocking is one payment, with no subscription, and Family Sharing is supported.

About

Lux Light Meter

Measure ambient light levels with your iPhone. Get real-time lux and foot-candle readings, with specialized modes for photography and plant care. Track light history and calibrate for accuracy.

Highlights
  • Ambient light metering (lux/fc)
  • Photography exposure suggestions
  • Plant light (PPFD/DLI) estimation
  • Continuous measurement and history
  • Optional meter calibration
  • Privacy-friendly local storage
Features
Read full description

Lux Light Meter: Illuminance A practical lux and illuminance meter for iPhone. Measure ambient light in seconds, check if a room is bright enough for study, work, or home use, and get helpful exposure and plant-lighting guidance when you need it. Core metering works offline. Key Features: Ambient light metering - Live lux / fc readings with scene targets that tell you if the light is too dim, about right, or too bright — plus simple tips to adjust Photography mode (Pro) - Aperture- or shutter-priority suggestions with ISO and exposure compensation so you can dial in exposure faster Plant mode (Pro) - Estimate PPFD and DLI for common houseplants, with light source and daily photoperiod options Continuous measure & history - Save single readings, track how light changes over time, and review min, average, and max values Optional calibration - Fine-tune against a trusted meter; Pro saves separate factors for the front and rear cameras Units & privacy-friendly storage - Switch between lux and fc; your measurements stay on your device How to Use: Open the app, allow camera access, and point your iPhone at the area you want to measure. Switch between Environment, Photography, and Plant modes, then save a reading or run a continuous measurement when you need a longer sample. Subscription Options: * Weekly and yearly subscriptions, plus a lifetime purchase * Payment will be charged to your Apple ID account * Subscriptions renew automatically within 24 hours before the current period ends * Manage or cancel anytime in your Account Settings Clearer readings. Better light decisions. Terms of Use: https://lightmeter.xzonesoft.com/terms.html Privacy Policy: https://lightmeter.xzonesoft.com/privacy.html Contact Us: support@xzonesoft.com

Screenshots

Uair4 screens
Lux Light Meter3 screens

Verdict

The call

The clearest difference is in-app purchases: Uair at none against Lux Light Meter's 3. Lux Light Meter's advantage is iOS requirement (17 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Lux Light Meter sells 3 in-app purchases, starting at $1.99 per 7 days. Uair asks for nothing beyond the download.

UpkeepUpdate frequency

Uair ships an update monthly, Lux Light Meter fortnightly. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

Scorecard2 real differences · 8 level
Uair versus Lux Light Meter: the parameters behind the verdict, then further details
ParameterUairLux Light Meter
PriceFreeFree
Rating—5.0 (5 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—5 — better
Update frequencyMonthlyFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.017 — better
Further details — not scored
Size5 MB4 MB
Age rating4+4+
DeveloperDominic McPhee灿耿 陈

In-app purchases

None

Uair

No in-app purchases

3 purchases

Lux Light Meter

Subscriptions2
  • Weekly Access$1.997 Days
  • Annual Subscription$7.991 Year
One-time1
  • Lifetime Access$12.99

Questions

Is Uair free?
Uair is free to download, with no in-app purchases.
Is Lux Light Meter free?
Lux Light Meter is free to download, with in-app purchases available.
Do Uair or Lux Light Meter have ads?
Neither Uair nor Lux Light Meter shows ads.
Which is updated more often, Uair or Lux Light Meter?
Uair ships an update monthly, and Lux Light Meter fortnightly. Most recently, Uair was updated on November 9, 2026 and Lux Light Meter on November 5, 2026.

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